CN112487614B - Room temperature evaluation method under non-design working condition of nuclear power plant and electronic equipment - Google Patents
Room temperature evaluation method under non-design working condition of nuclear power plant and electronic equipment Download PDFInfo
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Abstract
The invention relates to a room temperature evaluation method and electronic equipment under a non-design working condition of a nuclear power plant, comprising the following steps: acquiring room parameters; dividing rooms according to the room parameters, and determining room types; obtaining a predicted temperature of a room by adopting a preset method based on the room type; and evaluating the room temperature according to the predicted temperature. The invention quantifies the preconditions of test execution, can accurately evaluate the room temperature under the non-design working condition, solves the restriction of difficult searching of the design working condition window, and effectively improves the debugging quality of the heating, ventilation and air conditioning system of the nuclear power plant and the reliability of the test result.
Description
Technical Field
The invention relates to the technical field of heating ventilation and air conditioning systems of nuclear power plants, in particular to a room temperature evaluation method and electronic equipment under non-design working conditions of a nuclear power plant.
Background
In the past nuclear power plant construction projects, a nuclear power plant room temperature inspection test is required to be executed under a design working condition which is as close as possible, and the set test preconditions are as follows: the outdoor temperature is close to the design parameter, and the indoor heat load is maximum under the working condition of summer. Because of the constraints of various actual conditions such as external environment conditions, unit running states and the like, and the requirement that the test window is as close as possible is unquantifiable, the test window under the design working condition is difficult to ensure, and particularly, the test execution requirement can not be met in winter working condition test windows in summer hot winter warm areas.
Disclosure of Invention
The invention aims to solve the technical problem of providing a room temperature evaluation method and electronic equipment under a non-design working condition of a nuclear power plant aiming at the defects in the prior art.
The technical scheme adopted for solving the technical problems is as follows: a room temperature evaluation method under a non-design working condition of a nuclear power plant is constructed, which comprises the following steps:
acquiring room parameters;
dividing rooms according to the room parameters, and determining room types;
obtaining a predicted temperature of a room by adopting a preset method based on the room type;
and evaluating the room temperature according to the predicted temperature.
Preferably, the room type includes: a first type and a second type;
the first type is: no external wall exists; or the difference value between the energy transmitted into the room through the outer wall enclosure structure and the energy transmitted into the room is smaller than a preset value;
the second type is: the energy transmitted into the room by the outer wall enclosure structure and the energy transmitted into the room are different by more than a preset value.
Preferably, if the room type is: a first type;
the obtaining the predicted temperature of the room based on the room type by adopting a preset method comprises the following steps:
the predicted temperature of the room is obtained by direct measurement.
Preferably, said obtaining the predicted temperature of the room using direct measurement comprises:
acquiring the equipment operation thermal load in a room;
judging whether the equipment operation thermal load meets a measurement condition or not;
if so, measuring the current temperature in the room; the current temperature is the predicted temperature.
Preferably, the device operating thermal load satisfies the measurement condition:
in summer, the plant operating heat load reaches a maximum;
alternatively, the plant operating thermal load is in steady state during winter.
Preferably, if the room type is: a second type;
the obtaining the predicted temperature of the room based on the room type by adopting a preset method comprises the following steps:
and obtaining the predicted temperature of the room by adopting an extrapolation method.
Preferably, said using extrapolation to obtain a predicted temperature of the room comprises:
acquiring indoor parameters, air supply quantity and air supply temperature of a room;
establishing a heat balance of the room based on the indoor parameters, the supply air volume, and the supply air temperature;
determining a relationship between an indoor temperature and an outdoor temperature according to the heat balance of the room;
and obtaining the predicted temperature of the room according to the relation between the indoor temperature and the outdoor temperature.
Preferably, the relationship between the indoor temperature and the outdoor temperature is a linear relationship.
Preferably, the obtaining the predicted temperature of the room according to the relation between the indoor temperature and the outdoor temperature includes:
acquiring indoor temperature data and outdoor temperature data; the outdoor temperature data includes: a first outdoor measured temperature, a second outdoor measured temperature, and a third outdoor measured temperature; the indoor temperature data includes: a first indoor measured temperature, a second indoor measured temperature, and a third indoor measured temperature corresponding to the first outdoor measured temperature, the second outdoor measured temperature, and the third outdoor measured temperature;
obtaining a curve of the indoor temperature changing along with the outdoor temperature according to the first outdoor measured temperature, the second outdoor measured temperature, the third outdoor measured temperature, the first indoor measured temperature, the second indoor measured temperature, the third indoor measured temperature and the linear relation between the indoor temperature and the outdoor temperature;
and obtaining the predicted temperature of the room according to the curve of the indoor temperature changing along with the outdoor temperature.
Preferably, the method further comprises:
before the acquiring the indoor temperature data and the outdoor temperature data, the method comprises the following steps:
acquiring equipment operation parameters in a room;
judging whether the running state of the equipment is normal or not according to the running parameters of the equipment in the room;
if so, executing the step of acquiring indoor temperature data and outdoor temperature data when the equipment is in a stable running state.
Preferably, the temperature interval between the first outdoor measured temperature and the first outdoor measured temperature, and the temperature interval between the third outdoor measured temperature and the second outdoor measured temperature are all greater than or equal to a preset interval temperature.
The invention also provides a room temperature evaluation device under the non-design working condition of the nuclear power plant, which comprises:
an acquisition unit configured to acquire a room parameter;
the determining unit is used for dividing rooms according to the room parameters and determining room types;
the prediction unit is used for obtaining the predicted temperature of the room by adopting a preset method based on the room type;
and the evaluation unit is used for evaluating the room temperature according to the predicted temperature.
The present invention also provides an electronic device including: a memory and a processor; the memory is used for storing program instructions, and the processor is used for executing the steps of the method according to the program instructions stored in the memory.
The invention also provides a storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method as described above.
The room temperature evaluation method and the electronic equipment for the nuclear power plant under the non-design working condition have the following beneficial effects: comprising the following steps: acquiring room parameters; dividing rooms according to the room parameters, and determining room types; obtaining a predicted temperature of a room by adopting a preset method based on the room type; and evaluating the room temperature according to the predicted temperature. The invention quantifies the preconditions of test execution, can accurately evaluate the room temperature under the non-design working condition, solves the restriction of difficult searching of the design working condition window, and effectively improves the debugging quality of the heating, ventilation and air conditioning system of the nuclear power plant and the reliability of the test result.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic flow chart of a room temperature evaluation method under non-design working conditions of a nuclear power plant according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the heat balance of a room in accordance with the present invention;
FIG. 3 is a schematic diagram of a room exterior wall heat transfer calculation model of the present invention;
FIG. 4 is a graphical representation of the variation of indoor temperature with outdoor temperature in summer using extrapolation in accordance with the present invention;
FIG. 5 is a graphical representation of the change in winter indoor temperature with outdoor temperature using extrapolation in accordance with the present invention.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic flow chart of an alternative embodiment of each embodiment of a method for evaluating room temperature under non-design conditions of a nuclear power plant according to the present invention.
Wherein, the room temperature evaluation method of the invention needs to satisfy the following conditions: for an air-conditioned room: the air supply temperature of the system under the working condition in summer is more than or equal to the design value, and the air supply temperature of the system under the working condition in winter is less than or equal to the design value; the deviation between the air quantity of the air supply and the design value is not more than +/-10%; and the system and the equipment in the factory building are in a normal running state.
As shown in FIG. 1, the room temperature evaluation method under the non-design working condition of the nuclear power plant comprises the following steps:
step S101, acquiring room parameters.
In an embodiment of the present invention, the room parameters may include: the position of the room in the factory building, the structure of the room, the material of the outer wall of the room, etc.
Step S102, dividing rooms according to room parameters, and determining room types.
In the embodiment of the invention, the room types include: a first type and a second type.
Wherein the first type is: no external wall exists; or the difference between the energy transmitted into the room through the exterior wall enclosure and the energy transmitted into the room is smaller than a preset value. In some embodiments, the energy transferred into the room comprises heat or cold. The method comprises the following specific steps: the heat transferred into the room through the exterior wall enclosure is an order of magnitude less than the amount of cold transferred into the room; alternatively, the amount of cold transferred into the room through the exterior wall enclosure is an order of magnitude less than the amount of heat transferred into the room. In some embodiments, the preset value may be an order of magnitude, i.e., the difference between the energy delivered into the room through the exterior wall enclosure and the energy delivered into the room is less than an order of magnitude. For example, if the amount of cooling delivered into the room through the exterior wall enclosure is 10KJ and the amount of cooling delivered into the room is less than 1KJ, then the room of such a configuration is the first type of room.
Further, the room without the outer wall structure may specifically be: inside the building, and away from the room of the enclosure of the building. For example, there are 9 rooms in total in one building, where 8 rooms are all close to the building's enclosure, and the innermost one is all included by the other 8 rooms, at which time this room is far from the building's enclosure, i.e., the room without the outer wall structure.
In the embodiment of the present invention, the second type is: the energy transmitted into the room by the outer wall enclosure structure and the energy transmitted into the room are different by more than a preset value. Likewise, the preset value here is also an order of magnitude.
Step S103, obtaining the predicted temperature of the room by adopting a preset method based on the type of the room.
Specifically, if the room type is: a first type. Then a preset method is adopted based on the room type, and the obtaining of the predicted temperature of the room comprises: the predicted temperature of the room is obtained by direct measurement.
Wherein, the obtaining the predicted temperature of the room by adopting the direct measurement method comprises the following steps: acquiring the equipment operation thermal load in a room; judging whether the equipment operation thermal load meets the measurement condition or not; if so, measuring the current temperature in the room; the current temperature is the predicted temperature.
In the embodiment of the invention, the equipment operation thermal load meets the measurement conditions as follows: in summer, the equipment operation heat load reaches the maximum value; alternatively, during winter, the plant operating thermal load is in steady state.
As shown in fig. 2, fig. 2 is a schematic diagram of the heat balance of a room.
Wherein the factors influencing the temperature T in the room are the supply air temperature T supply Air volume of air supplyThermal load in the factory building->Heat transfer of building enclosure>These four factors. As shown in fig. 2.
When the air supply temperature and the air supply volume are fixed, the factors influencing the room temperature are two factors, namely the heat load in the room (namely the equipment running heat load in the room) and the heat transfer of the room enclosure structure, and when the heat load in the room reaches the maximum value in summer; alternatively, in winter, when the heat load in the room is in a stable state, the temperature in the room is only affected by the heat transfer of the enclosure. The outdoor environment temperature only affects the room with the outer wall, and the influence of the outdoor temperature is not needed to be considered when the temperature is checked for the room without the outer wall. For rooms with external walls: when the amount of heat (coldness) transferred to the interior of the room through the exterior wall enclosure is an order of magnitude less than the amount of coldness (heat) transferred into the room, the effect on temperature is negligible. When the temperature of the factory building is checked, the influence of outdoor temperature is not needed to be considered, and the direct measurement can be carried out only when the air supply temperature and the air supply air quantity are designed values and the heat load in the room is maximum.
Further, as shown in fig. 3, a schematic diagram of a heat transfer calculation model of the external wall of the room is shown.
As shown in fig. 3, according to the outer wall structure of the room, the enclosure area of the room, the outdoor temperature and the total thermal resistance are determined, and then the heat transferred by the outer wall enclosure is calculated. I.e.
The exterior wall enclosure structure and the outdoor heat transfer satisfy the following formula:
wherein: s, an envelope area (m 2); t (T) outside -outdoor temperature (°c); r-total thermal resistance (kW/m 2. Degree. C.).
Therefore, the heat transmitted by the outer wall enclosure structure can be calculated through the formula 1, and then compared with the heat transmitted into a room, if the heat is smaller than an order of magnitude, a direct measurement method can be adopted; if greater than an order of magnitude, extrapolation is used.
In the embodiment of the invention, if the room type is: a second type. Then a preset method is adopted based on the room type, and the obtaining of the predicted temperature of the room comprises: and obtaining the predicted temperature of the room by adopting an extrapolation method.
Wherein, the extrapolation method is adopted to obtain the predicted temperature of the room, which comprises the following steps: acquiring indoor parameters, air supply quantity and air supply temperature of a room; establishing heat balance of the room based on the indoor parameters, the air supply quantity and the air supply temperature; determining the relation between the indoor temperature and the outdoor temperature according to the heat balance of the room; and obtaining the predicted temperature of the room according to the relation between the indoor temperature and the outdoor temperature.
In the embodiment of the invention, the relation between the indoor temperature and the outdoor temperature is a linear relation.
Specifically, the indoor parameters of the room include: the heat transfer capacity of the enclosure structure of the outer wall of the room, the running heat load of equipment in the room, the heat load of a heater for maintaining the temperature of the room and the cooling capacity of a refrigerating unit for maintaining the temperature of the room.
Wherein the heat balance of the room satisfies:
wherein:-envelope heat transfer quantity (kW); />-in-room equipment operating heat load (kW); />-heat load (kW) of the heater maintaining the room temperature; />-cooling capacity (kW) of a refrigeration unit maintaining room temperature;-air supply quantity (kW); ρ -air Density (kg/m) 3 )；C p Specific heat of air (kJ/kg. Deg.C); t (T) supply -air supply temperature (°c); t-room temperature (. Degree. C.).
As can be seen from the formula (2), for a ventilated room, i.e. a room in which no air conditioner is provided and which is ventilated, the supply air temperature is comparable to the outdoor temperature whenWhen the temperature is fixed, the room temperature and the outdoor temperature are in a linear relation. For an air-conditioned room, when-> T supply When the temperature is fixed, the room temperature and the outdoor temperature are in a linear relation. Alternatively, in other embodiments, when +.>Also when the temperature is fixed (no external wall room or external wall room is provided but the difference between the outdoor design temperature and the room design temperature is less than 5 ℃), the room temperature is independent of the outdoor temperature-at this time, the room temperature can be measured by adopting a direct measurement method.
Further, obtaining the predicted temperature of the room from the relationship between the indoor temperature and the outdoor temperature includes:
acquiring indoor temperature data and outdoor temperature data; the outdoor temperature data includes: a first outdoor measured temperature, a second outdoor measured temperature, and a third outdoor measured temperature; the indoor temperature data includes: a first indoor measured temperature, a second indoor measured temperature, and a third indoor measured temperature corresponding to the first outdoor measured temperature, the second outdoor measured temperature, and the third outdoor measured temperature; obtaining a curve of the indoor temperature along with the change of the outdoor temperature according to the first outdoor measured temperature, the second outdoor measured temperature, the third outdoor measured temperature, the first indoor measured temperature, the second indoor measured temperature, the third indoor measured temperature and the linear relation between the indoor temperature and the outdoor temperature; and obtaining the predicted temperature of the room according to the curve of the indoor temperature along with the change of the outdoor temperature.
The temperature interval between the first outdoor measured temperature and the first outdoor measured temperature, and the temperature interval between the third outdoor measured temperature and the second outdoor measured temperature are all larger than or equal to the preset interval temperature. In the embodiment of the invention, the preset interval temperature is 2 ℃.
Further, in an embodiment of the present invention, before acquiring the indoor temperature data and the outdoor temperature data, the method includes: acquiring equipment operation parameters in a room; judging whether the operation state of the equipment is normal or not according to the operation parameters of the equipment in the room; if so, executing the step of acquiring indoor temperature data and outdoor temperature data when the equipment is in a stable running state. Specifically, the plant operating parameters include, but are not limited to, plant operating speed, plant operating time, plant operating power, and the like.
For example, during summer conditions, the in-room equipment and systems are in normal operation, and the room with the air conditioning or cooling unit is forced on during each test and maintains stable operation. Three conditions with different outdoor temperatures are selected, and the outdoor temperature T is measured 1 、T 2 、T 3 (T 1 And T is 2 Temperature interval of not less than 2 ℃ and T 2 And T is 3 The temperature interval of not less than 2 ℃ and the corresponding indoor temperature t 1 、t 2 、t 3 And then, the measured data are drawn on a rectangular coordinate system, so that a straight line of the indoor temperature changing along with the outdoor temperature as shown in fig. 4 can be obtained, and the indoor temperature T corresponding to the outdoor design temperature T can be obtained according to the extension line of the straight line, namely, the predicted temperature T of the corresponding room when the outdoor design temperature T is predicted.
In winter conditions, rooms with air conditioning or electric heaters should be forced to start during each test and maintain stable operation. Selecting measuring chambers under three conditions of different outdoor temperaturesExternal temperature T 1 、T 2 、T 3 (T 1 And T is 2 Temperature interval of not less than 2 ℃ and T 2 And T is 3 The temperature interval of not less than 2 ℃ and the corresponding indoor temperature t 1 、t 2 、t 3 And then, the measured data are drawn on a rectangular coordinate system, so that a straight line of indoor temperature changing along with outdoor temperature as shown in the following figure 5 can be obtained, and according to the extension line of the straight line, the indoor temperature T corresponding to the outdoor design temperature T can be obtained, namely, the predicted temperature T of the corresponding room when the outdoor design temperature T is predicted.
Step S104, evaluating the room temperature according to the predicted temperature.
Specifically, in step S103, the predicted temperature of the room is predicted, and the predicted temperature is compared with the reference temperature range, and if the predicted temperature is within the parameter temperature range, the room temperature is determined to be acceptable, otherwise, the room temperature is determined to be unacceptable.
According to the invention, through classifying the rooms of the nuclear power plant, the temperature measurement can be directly carried out on the factory buildings or rooms which are not influenced by the external environment (the winter and summer design working condition test is not required to be executed); for the room affected by the external environment, the relation that the room temperature and the external temperature are positively correlated is deduced, so that the prediction can be performed by using an extrapolation method, namely, by measuring the indoor temperatures of different external temperatures, drawing points and extrapolating to the predicted temperatures under the design working conditions, and further, whether the overall performance of the ventilation system meets the requirements of the temperature and humidity control function of the room of the nuclear power plant can be evaluated. Meanwhile, the restriction of a test window can be effectively solved, the embarrassment of the ventilation system test of eating by the sky is ended, the room temperature inspection test under the working condition of winter and summer can be reliably completed, the progress of nuclear power engineering projects is promoted, and high economic benefit is achieved.
Furthermore, the invention also provides a room temperature evaluation device under the non-design working condition of the nuclear power plant. The device can be used for realizing the room temperature evaluation method under the non-design working condition of the nuclear power plant disclosed by the embodiment of the invention. The room temperature evaluation device under the non-design working condition of the nuclear power plant comprises: an acquisition unit configured to acquire a room parameter; the determining unit is used for dividing rooms according to room parameters and determining room types; the prediction unit is used for obtaining the predicted temperature of the room by adopting a preset method based on the type of the room; and the evaluation unit is used for evaluating the room temperature according to the predicted temperature.
Further, the present invention also provides an electronic device, including: a memory and a processor; the memory is used for storing program instructions, and the processor is used for executing the steps of the room temperature evaluation method under the non-design working condition of the nuclear power plant disclosed by the embodiment of the invention according to the program instructions stored in the memory.
The invention also provides a storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the room temperature evaluation method under non-design conditions of a nuclear power plant as disclosed in the embodiment of the invention.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same according to the content of the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made with the scope of the claims should be covered by the claims.
Claims (14)
1. A room temperature evaluation method under a non-design working condition of a nuclear power plant is characterized by comprising the following steps:
acquiring room parameters;
dividing rooms according to the room parameters, and determining room types;
obtaining a predicted temperature of a room by adopting a preset method based on the room type;
and evaluating the room temperature according to the predicted temperature.
2. The method for evaluating room temperature under non-design conditions of a nuclear power plant according to claim 1, wherein the room type comprises: a first type and a second type;
the first type is: no external wall exists; or the difference value between the energy transmitted into the room through the outer wall enclosure structure and the energy transmitted into the room is smaller than a preset value;
the second type is: the energy transmitted into the room by the outer wall enclosure structure and the energy transmitted into the room are different by more than a preset value.
3. The method for evaluating room temperature under non-design conditions of a nuclear power plant according to claim 2, wherein if the room type is: a first type;
the obtaining the predicted temperature of the room based on the room type by adopting a preset method comprises the following steps:
the predicted temperature of the room is obtained by direct measurement.
4. The method for evaluating the room temperature under the non-design condition of the nuclear power plant according to claim 3, wherein the obtaining the predicted room temperature by using the direct measurement method comprises:
acquiring the equipment operation thermal load in a room;
judging whether the equipment operation thermal load meets a measurement condition or not;
if so, measuring the current temperature in the room; the current temperature is the predicted temperature.
5. The method for evaluating room temperature under non-design conditions of a nuclear power plant according to claim 4, wherein the equipment operation thermal load satisfies a measurement condition:
in summer, the plant operating heat load reaches a maximum;
alternatively, the plant operating thermal load is in steady state during winter.
6. The method for evaluating room temperature under non-design conditions of a nuclear power plant according to claim 2, wherein if the room type is: a second type;
the obtaining the predicted temperature of the room based on the room type by adopting a preset method comprises the following steps:
and obtaining the predicted temperature of the room by adopting an extrapolation method.
7. The method for evaluating the room temperature under the non-design condition of the nuclear power plant according to claim 6, wherein the extrapolation method comprises:
acquiring indoor parameters, air supply quantity and air supply temperature of a room;
establishing a heat balance of the room based on the indoor parameters, the supply air volume, and the supply air temperature;
determining a relationship between an indoor temperature and an outdoor temperature according to the heat balance of the room;
and obtaining the predicted temperature of the room according to the relation between the indoor temperature and the outdoor temperature.
8. The method for evaluating room temperature under non-design conditions of a nuclear power plant according to claim 7, wherein the relationship between the indoor temperature and the outdoor temperature is a linear relationship.
9. The method for evaluating the room temperature under the non-design condition of the nuclear power plant according to claim 8, wherein the obtaining the predicted temperature of the room according to the relationship between the indoor temperature and the outdoor temperature comprises:
acquiring indoor temperature data and outdoor temperature data; the outdoor temperature data includes: a first outdoor measured temperature, a second outdoor measured temperature, and a third outdoor measured temperature; the indoor temperature data includes: a first indoor measured temperature, a second indoor measured temperature, and a third indoor measured temperature corresponding to the first outdoor measured temperature, the second outdoor measured temperature, and the third outdoor measured temperature;
obtaining a curve of the indoor temperature changing along with the outdoor temperature according to the first outdoor measured temperature, the second outdoor measured temperature, the third outdoor measured temperature, the first indoor measured temperature, the second indoor measured temperature, the third indoor measured temperature and the linear relation between the indoor temperature and the outdoor temperature;
and obtaining the predicted temperature of the room according to the curve of the indoor temperature changing along with the outdoor temperature.
10. The method for evaluating room temperature under non-design conditions of a nuclear power plant according to claim 9, further comprising:
before the acquiring the indoor temperature data and the outdoor temperature data, the method comprises the following steps:
acquiring equipment operation parameters in a room;
judging whether the running state of the equipment is normal or not according to the running parameters of the equipment in the room;
if so, executing the step of acquiring indoor temperature data and outdoor temperature data when the equipment is in a stable running state.
11. The method according to claim 9, wherein the temperature interval between the first outdoor measured temperature and the second outdoor measured temperature, and the temperature interval between the third outdoor measured temperature and the second outdoor measured temperature are all greater than or equal to a preset interval temperature.
12. The utility model provides a room temperature evaluation device under nuclear power plant's non-design operating mode which characterized in that includes:
an acquisition unit configured to acquire a room parameter;
the determining unit is used for dividing rooms according to the room parameters and determining room types;
the prediction unit is used for obtaining the predicted temperature of the room by adopting a preset method based on the room type;
and the evaluation unit is used for evaluating the room temperature according to the predicted temperature.
13. An electronic device, comprising: a memory and a processor; the memory is configured to store program instructions and the processor is configured to perform the steps of the method of any one of claims 1-11 in accordance with the program instructions stored in the memory.
14. A storage medium having stored thereon a computer program, which when executed by a processor performs the steps of the method according to any of claims 1-11.
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